Motorcycle valve box Honda CR250R 1020949

The engineers Boyesen have developed a series of technical innovations in their range of intake systems to optimise power, torque and responsiveness: Aerodynamic Surface Optimization (optimisation of internal surfaces), Model-Specific Reed Petal Tensioning (reed valve specific to each model), Material Fuel Resistance (materials resistant to hydrocarbons), and Multi-Stage Reed Timing (staged opening reed valves).
The reed valves BOYESEN are specifically developed for each motorbike model.

• 100% aluminium reed valve body, optimised internal surface
• 4-way diffuser to optimise airflow and prevent pressure loss
• Intake pipe and mounting clips provided, direct fitting without modification
• Variable flexibility reeds, specific to each model (made from aerospace-grade carbon)
• Rubber-coated reeds that are resistant to hydrocarbons for prolonged gasket life

The RC2 reed valves, developed for competition, significantly optimise intake flows, leading to greater efficiency, more power and better revs on YOUR bike!